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Health and wellbeing

Our health and wellbeing centres offer you and your family helpful information about medical conditions and illnesses as well as lots of tips to inspire and support you to make better decisions around your lifestyle and wellbeing.

Our health and wellbeing centres offer you and your family helpful information about medical conditions and illnesses as well as lots of tips to inspire and support you to make better decisions around your lifestyle and wellbeing.

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Cardiomyopathy

Read about cardiomyopathy, a general term for diseases of the heart muscle, where the walls of the heart chambers have become stretched, thickened or stiff

3 October 2018

Introduction

Cardiomyopathy is a general term for diseases of the heart muscle, where the walls of the heart chambers have become stretched, thickened or stiff. This affects the heart's ability to pump blood around the body.

Some types of cardiomyopathy are inherited and are seen in children and younger people.

Dilated cardiomyopathy

In dilated cardiomyopathy the muscle walls of the heart have become stretched and thin, so they can't contract (squeeze) properly to pump blood around the body.

How serious is it?

If you have dilated cardiomyopathy, you're at greater risk of heart failure ↗, where the heart fails to pump enough blood around the body at the right pressure.

More information

Hypertrophic cardiomyopathy

In hypertrophic cardiomyopathy, the heart muscle cells have enlarged and the walls of the heart chambers thicken.

The chambers are reduced in size so they can't hold much blood, and the walls can't relax properly and may stiffen.

How serious is it?

Most people with hypertrophic cardiomyopathy will be able to live a full, normal life. Some people don't even have symptoms and don't need treatment.

But that doesn't mean the condition can't be serious. Hypertrophic cardiomyopathy is the most common cause of sudden unexpected death in childhood and in young athletes.

The main heart chambers can become stiff, leading to back pressure on the smaller collecting chambers. This can sometimes worsen the symptoms of heart failure and lead to abnormal heart rhythms (atrial fibrillation) ↗.

Blood flow from the heart may become reduced or restricted (known as obstructive hypertrophic cardiomyopathy).

Also, the mitral heart valve can become leaky, causing blood to leak backwards. Read more about mitral regurgitation ↗.

These heart changes can cause dizziness, chest pain, shortness of breath and temporary loss of consciousness.

You'll also be at greater risk of developing endocarditis ↗ (a heart infection).

If you have severe hypertrophic cardiomyopathy, you'll need to see your doctor regularly so your condition can be monitored.

Your doctor will advise about the level and amount of exercise you can do and sensible lifestyle changes to make.

Who's affected?

Hypertrophic cardiomyopathy is thought to affect 1 in 500 people in the UK. Most people inherit the disease from their parents.

More information

Restrictive cardiomyopathy

Restrictive cardiomyopathy is rare and mostly affects older adults. The walls of the main heart chambers become stiffened and rigid and can't relax properly after contracting. This means the heart can't fill up properly with blood.

It results in reduced blood flow from the heart and can lead to symptoms of heart failure ↗, such as breathlessness, tiredness and ankle swelling, as well as heart rhythm problems.

In many cases the cause is unknown, although sometimes it can be inherited.

More information

Arrhythmogenic right ventricular cardiomyopathy

In arrhythmogenic right ventricular cardiomyopathy (ARVC), the proteins that normally hold the heart muscle cells together are abnormal. Muscle cells can die and the dead muscle tissue is replaced with fatty and fibrous tissue.

The walls of the main heart chambers become thin and stretched, and can't pump blood around the body properly.

ARVC is an uncommon inherited condition caused by a mutation (change) in one or more genes. It can affect teenagers or young adults and has been the reason for some sudden unexplained deaths in young athletes.

There's increasing evidence that prolonged, strenuous exercise worsens the symptoms of ARVC. It's important that people with or at risk of ARVC have a careful discussion about this with their cardiologist.

Diagnosing cardiomyopathy

Cardiomyopathy that runs in the family can be diagnosed after a genetic test. If you've been diagnosed with cardiomyopathy, you may be advised to have a genetic test to identify the mutation (faulty gene) that caused this.

Your relatives can then be tested for the same mutation and, if they have it, their condition can be monitored and managed early.

Treating cardiomyopathy

There's no cure for cardiomyopathy, but the treatments described below are usually effective at controlling symptoms and preventing complications.

Not everyone with cardiomyopathy will need treatment. Some people only have a mild form of the disease that they can control after making a few lifestyle changes.

Lifestyle changes

If the cause of your cardiomyopathy isn't genetic, it should generally help to:

Hospital procedures

In some people with obstructive hypertrophic cardiomyopathy, the septum (the wall dividing the left and right side of the heart) is thickened and bulges into the main heart chamber. They may need to have either:

an injection of alcohol into their heart – this is to reduce part of the muscle in the septum

a septal myectomy – heart surgery to remove part of the thickened septum (the mitral valve may be repaired at the same time, if necessary)

Those with heart rhythm problems may need to have a pacemaker, or a similar device, implanted to control their abnormal heart rhythm. Read more about having a pacemaker fitted ↗.

Broken heart syndrome

Some people who sustain significant emotional or physical stress, such as bereavement or major surgery, go on to experience a temporary heart problem.

The heart muscle becomes suddenly weakened or "stunned", causing the left ventricle (one of the heart's main chambers) to change shape. It may be caused by a surge of hormones, particularly adrenaline, during this period of stress.

The main symptoms are chest pain and breathlessness, similar to those of a heart attack – always call 999 if you or someone else experiences these.

The condition – known medically as Takotsubo cardiomyopathy, or acute stress cardiomyopathy – is temporary and reversible. It's unusual for it to happen again.

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